1. The reported shares were sold to satisfy the Reporting Person's tax liability in connection with the vesting of restricted stock units ("RSUs") and performance units ("PSUs").

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $116.41 to $117.39, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) and (7) through (8) to this Form 4.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $117.41 to $118.23, inclusive.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $118.41 to $119.20, inclusive.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $119.43 to $119.82, inclusive.

6. The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 28, 2017.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $116.89 to $117.85, inclusive.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $117.89 to $118.80, inclusive.

Remarks:

/s/ Steve Dean, by power of attorney

06/13/2018

** Signature of Reporting Person

Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person,
see
Instruction
4
(b)(v).